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Not sure what happened to my previous response but here's what I'm attempting to do:

Two separate game objects, both have the Player Character component added to them. One is a vehicle, the other is the player on foot. 

Camera motor is set to First Person. Regardless of how many camera motors I have in the scene, if they are all set to First Person perspective, there isn't an option to tell the camera or motor which Player Character component to work for. 

The player character is in first person, and mounts the vehicle which is also in first person view. If an option were added for what game object or which character was to be focused on per camera motor (within the first person mode), that would certainly work